White light-emitting diode

TLDR: In this paper, a light-emitting device comprising a UV diode with a primary emission of 300 nm ≤ μ ≤ 370 nm, and a phosphor layer consisting of a combination of a blue-light emitting phosphor with an emission band of 430 nm ≤ µ ≤ 490 nm, a green-light inducing phosphor having an emission bands of 520 nm ≤μ ≤ 570 nm and a red-light emission phosphor had an emission range of 590 nm ≤ ε ≤ 660 nm.

Abstract: The invention relates to a light-emitting device comprising a UV diode with a primary emission of 300 nm ≤ μ ≤ 370 nm,and a phosphor layer consisting of a combination of a blue-light emitting phosphor with an emission band of 430 nm ≤ μ ≤ 490 nm, a green-light emitting phosphor with an emission band of 520 nm ≤ μ ≤ 570 nm and a red-light emitting phosphor with an emission band of 590 nm ≤ μ ≤ 630 nm, said device emitting high-quality white light. The colour rendering index CRI is 90 at a colour temperature of 4 000 K. As colour rendering depends only on the composition of the three phosphors and not on the relation of converted to non-converted light it is easyto control and regulate.